CN108879841B - Parallel charging circuit and mobile terminal - Google Patents
Parallel charging circuit and mobile terminal Download PDFInfo
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- CN108879841B CN108879841B CN201810695395.XA CN201810695395A CN108879841B CN 108879841 B CN108879841 B CN 108879841B CN 201810695395 A CN201810695395 A CN 201810695395A CN 108879841 B CN108879841 B CN 108879841B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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Abstract
The invention discloses a parallel charging circuit and a mobile terminal, and the method comprises the following steps: the system comprises a main power management chip, an auxiliary power management chip, a heterogeneous parallel charging controllable switch and a wireless charging receiving chip, wherein one of the main power management chip and the auxiliary power management chip is in butt joint with an external wired charger, and the other power management chip is in butt joint with an external wireless charger through the wireless charging receiving chip; the heterogeneous parallel charging controllable switch is connected between the auxiliary power supply management chip and an external corresponding charger and is controlled by the enabling of the main power supply management chip. The invention realizes the simultaneous wireless and wired charging.
Description
Technical Field
The invention relates to the field of mobile terminal control, in particular to a parallel charging circuit and a mobile terminal.
Background
In the current wireless charging technology, because the output power supply of the wireless charger is inconsistent with the charging power supply of the USB power supply, the charging can not be carried out simultaneously. In all wireless charging schemes of the mobile terminal, the wired charging mode is preferentially used, and wireless charging is allowed to be used under the condition that the wired charging condition does not exist. Moreover, circuits of the mobile terminal are designed with circuits for isolating wired charging and wireless charging so as to protect circuits behind the interface; meanwhile, the connecting wire that the user inserted the USB power supply charging source when the mobile terminal carries out wireless charging is prevented from entering, and the internal circuit of the mobile terminal is prevented from being damaged.
However, with such a design scheme, when a user uses a wireless charging mode for charging, if the user wants to use a wired charging mode simultaneously to realize quick charging, the user cannot realize the quick charging. Or, when the user is charging by using the wired charging mode, if the user wants to realize quick charging, the user cannot realize the quick charging.
This patent provides a wireless charging and wired charging circuit design scheme, and this circuit scheme not only realizes wired and wireless charging simultaneously, still is the design of a circuit safety protection level simultaneously, is realizing more circuit functions with very low cost of few devices.
Disclosure of Invention
The invention mainly aims to provide a parallel charging circuit and a mobile terminal, and aims to realize simultaneous wireless and wired charging.
In order to achieve the above object, the present invention provides a parallel charging circuit, including: a main power supply management chip, an auxiliary power supply management chip, a heterogeneous charging controllable switch and a wireless charging receiving chip, wherein,
one power management chip of the main power management chip and the auxiliary power management chip is in butt joint with an external wired charger, and the other power management chip is in butt joint with an external wireless charger through a wireless charging receiving chip;
the heterogeneous parallel charging controllable switch is connected between the auxiliary power supply management chip and an external corresponding charger and is controlled by the enabling of the main power supply management chip.
Optionally, as a first specific implementation manner, in a process that a charger docked with the main power management chip is used to charge a battery, the main power management chip controls the heterogeneous charging controllable switch to be turned on so as to input a power supply provided by the charger docked with the auxiliary power management chip to the auxiliary power management chip;
and the main power supply management chip informs the auxiliary power supply management chip to charge the battery by adopting the voltage in accordance with the negotiation.
Optionally, as a second specific implementation manner, an input end of the heterogeneous charging controllable switch is connected to an output end of the wireless charging receiving chip, an output end of the heterogeneous charging controllable switch is connected to a USB working voltage input end of the auxiliary power management chip, and a controlled end of the heterogeneous charging controllable switch is connected to a dc enabling end of the main power management chip;
the direct current detection end of the main power management chip is connected with the output end of the wireless charging receiving chip or the input end of the heterogeneous parallel charging controllable switch;
the main power supply management chip is used for detecting whether a charger in butt joint with the auxiliary power supply management chip provides power supply access through the direct current detection end, and if so, the main power supply management chip controls the heterogeneous charging and charging controllable switch to be conducted through the direct current enabling end so as to input power supply provided by the charger in butt joint with the auxiliary power supply management chip to the USB working voltage input end of the auxiliary power supply management chip.
Optionally, the circuit further includes: the input end of the same type parallel charging controllable switch is connected with the middle voltage end of the main power management chip, the output end of the same type parallel charging controllable switch is connected with the USB working voltage input end of the auxiliary power management chip, and the controlled end of the same type parallel charging controllable switch is connected with the USB enabling end of the main power management chip;
when the main power supply management chip detects that the charger butted with the auxiliary power supply management chip does not provide power supply access through the direct current detection end:
the main power supply management chip controls the similar charging controllable switch to be switched on through the USB enabling end so as to input a power supply which is provided by a charger corresponding to the main power supply management chip and is output through the middle voltage end to the USB working voltage input end of the auxiliary power supply management chip, and simultaneously controls the heterogeneous charging controllable switch to be switched off through the DC enabling end; and the main power supply management chip informs the auxiliary power supply management chip to charge the battery by adopting the voltage in accordance with the negotiation.
Or the main power management chip controls the heterogeneous and controllable switch to be switched off through the direct current enabling end.
Optionally, the homogeneous parallel charging controllable switch and the heterogeneous parallel charging controllable switch both include: transistor-like switches, or, chip-like switches.
Optionally, the transistor-based switch includes: a single transistor switch, or a combination of transistors;
the chip switch comprises: the high voltage protects the chip.
Optionally, based on a first specific implementation manner, in a process that the main power management chip charges a battery by using a charger docked with the main power management chip, the main power management chip is further configured to:
before controlling the heterogeneous charging controllable switch to be conducted, judging whether the voltage of the battery reaches a set starting voltage threshold value or not;
if so, controlling the heterogeneous charging controllable switch to be conducted so as to input power provided by a charger in butt joint with the auxiliary power management chip into the auxiliary power management chip;
if not, trickle charging is carried out on the battery by adopting a charger in butt joint with the main power supply management chip, and the heterogeneous charging controllable switch is controlled to be conducted until the voltage of the battery reaches a set starting voltage threshold value so as to input the power supply provided by the charger in butt joint with the auxiliary power supply management chip to the auxiliary power supply management chip.
Optionally, based on a second specific implementation manner, in a process that the main power management chip charges a battery by using a charger docked with the main power management chip, the main power management chip is further configured to:
before detecting whether a charger in butt joint with the auxiliary power management chip provides power access, judging whether the voltage of the battery reaches a set starting voltage threshold value;
if yes, detecting whether a charger in butt joint with the auxiliary power management chip provides power access;
if not, trickle charging is carried out on the battery by adopting a charger in butt joint with the main power supply management chip, and whether the charger in butt joint with the auxiliary power supply management chip provides power supply access is detected until the voltage of the battery reaches a set starting voltage threshold value.
Optionally, when the main power management chip and the auxiliary power management chip are used to charge the battery concurrently, the main power management chip is further configured to:
judging whether the voltage of the battery reaches a set full-charge voltage threshold value:
if so, gradually reducing the charging current provided by the main power supply management chip or the auxiliary power supply management chip for the battery.
In addition, in order to achieve the above object, the present invention further provides a mobile terminal including the above parallel charging circuit.
The parallel charging circuit and the mobile terminal provided by the invention solve the problem that wireless charging and wired charging cannot be simultaneously charged. Second, the switching between wired parallel charging and wireless parallel charging can be realized. And thirdly, the high-voltage protection chip is used for switching the power supply circuit, so that the purpose of switching the circuit power supply is realized while the effect of protecting the power supply circuit is achieved, and the design cost of the circuit is reduced. Fourth, the condition that the USB is inserted to charge by mistake and leads to charging circuit to damage when having avoided the user to carry out wireless charging to mobile terminal has promoted user and has used experience.
Drawings
Fig. 1 is a schematic hardware configuration diagram of an alternative mobile terminal implementing various embodiments of the present invention;
FIG. 2 is a connection diagram of a parallel charging circuit according to a first embodiment of the present invention;
FIG. 3 is a connection diagram of a parallel charging circuit according to a second embodiment of the present invention;
FIG. 4 is a connection diagram of a parallel charging circuit according to a third embodiment of the present invention;
FIG. 5 is a diagram of a configuration of a single transistor switch according to a third embodiment of the present invention;
FIG. 6 shows a structure of a transistor combination switch according to a third embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a high voltage protection chip according to a third embodiment of the present invention;
FIG. 8 is a schematic diagram of a parallel charging circuit connection according to an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.
The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile terminal in detail with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex-Long Term Evolution), and TDD-LTE (Time Division duplex-Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.
Based on the above-described mobile terminal hardware structure, various embodiments of the present invention are proposed.
As shown in fig. 2, a first embodiment of the present invention provides a parallel charging circuit, including: a main power management chip 201, an auxiliary power management chip 202, a heterogeneous charging controllable switch 203 and a wireless charging receiving chip 204, wherein,
one power management chip of the main power management chip 201 and the auxiliary power management chip 202 is in butt joint with an external wired charger, and the other power management chip is in butt joint with an external wireless charger through the wireless charging receiving chip 204; in the embodiment of the present invention, specific connection correspondence between the main power management chip 201 and the auxiliary power management chip 202 and external wired chargers and wireless chargers is not limited, that is, various one-to-one connection correspondence between two types of power management chips and two types of chargers may be possible.
The heterogeneous charging controllable switch 203 is connected between the auxiliary power management chip 202 and an external corresponding charger, and is controlled by the enabling of the main power management chip 201.
The invention manages the charging of the battery by the main power management chip 201 on one hand, and introduces the auxiliary power management chip 202 to charge the battery simultaneously by the heterogeneous charging controllable switch 203 under the condition of meeting the conditions on the other hand.
Optionally, in the process of charging the battery by using the charger docked with the main power management, the main power management chip 201 controls the heterogeneous charging controllable switch 203 to be turned on so as to input the power provided by the charger docked with the auxiliary power management chip 202 to the auxiliary power management chip 202;
the primary power management chip 201 notifies the secondary power management chip 202 to charge the battery with the voltage in accordance with the negotiation. At this time, the auxiliary power management chip 202 charges the battery by using the power provided by the charger docked with the auxiliary power management chip 202, the main and auxiliary power management chips 202 may communicate with each other through the internal bus connection, and the main power management chip 201 notifies the auxiliary power management chip 202 that the voltages used when the batteries are charged in parallel need to be agreed, but the charging currents may be set according to respective policies.
Optionally, based on the conventional practice in the field at the initial charging time, the embodiment of the present invention also designs a technical solution of adopting trickle charging when the battery voltage is low at the initial charging time, that is, when the main power management chip 201 adopts a charger interfacing with the main power management to charge the battery, the main power management chip 201 is further configured to:
before controlling the heterogeneous charging controllable switch 203 to be conducted, judging whether the voltage of the battery reaches a set starting voltage threshold value;
if yes, the heterogeneous charging controllable switch 203 is controlled to be turned on so as to input power provided by a charger docked with the auxiliary power management chip 202 into the auxiliary power management chip 202;
if not, a charger in butt joint with the main power management chip 201 is used for trickle charging the battery, and the heterogeneous charging controllable switch 203 is controlled to be switched on until the voltage of the battery reaches a set starting voltage threshold value so as to input the power provided by the charger in butt joint with the auxiliary power management chip 202 to the auxiliary power management chip 202.
Optionally, when the main power management chip 201 and the auxiliary power management chip 202 charge the battery in parallel, it is determined whether the voltage of the battery reaches a set full-charge voltage threshold:
if yes, gradually reducing the charging current provided by the main power management chip 201 or the auxiliary power management chip 202 for the battery.
Since the battery of the mobile terminal is connected to the circuit inside the mobile terminal, and besides the battery, the circuit also includes some necessary peripheral circuit components, such as wires, etc., if the measured voltage of the battery has reached the full-charge voltage threshold, which is usually 4.4V, it cannot be said that the voltage of the battery itself has reached 4.4V, but is about to reach 4.4V, so that the final charging process can be continuously completed by gradually reducing the charging current of the auxiliary power management chip 202 or the main power management chip 201.
In the embodiment of the invention, the charger in butt joint with the main power management chip 201 and the charger in butt joint with the auxiliary power management chip 202 are simultaneously used for charging the battery of the mobile terminal under the control of the main power management chip 201, so that the quick charging is realized, and the heat productivity of a single power management chip is reduced.
As shown in fig. 3, a second embodiment of the present invention provides a parallel charging circuit, including: a main power management chip 201, an auxiliary power management chip 202, a heterogeneous charging controllable switch 203 and a wireless charging receiving chip 204, wherein,
one power management chip of the main power management chip 201 and the auxiliary power management chip 202 is in butt joint with an external wired charger, and the other power management chip is in butt joint with an external wireless charger through the wireless charging receiving chip 204; in the embodiment of the present invention, specific connection correspondence between the main power management chip 201 and the auxiliary power management chip 202 and external wired chargers and wireless chargers is not limited, that is, various one-to-one connection correspondence between two types of power management chips and two types of chargers may be possible.
The heterogeneous charging controllable switch 203 is connected between the auxiliary power management chip 202 and an external corresponding charger, and is controlled by the enabling of the main power management chip 201.
The invention manages the charging of the battery by the main power management chip 201 on one hand, and introduces the auxiliary power management chip 202 to charge the battery simultaneously by the heterogeneous charging controllable switch 203 under the condition of meeting the conditions on the other hand.
Optionally, an input end of the heterogeneous charging controllable switch 203 is connected to an output end of the wireless charging receiving chip 204, an output end of the heterogeneous charging controllable switch 203 is connected to a USB working voltage input end of the auxiliary power management chip 202, and a controlled end of the heterogeneous charging controllable switch 203 is connected to a dc enabling end of the main power management chip 201;
the direct current detection end of the main power management chip 201 is connected with the output end of the wireless charging receiving chip 204 or the input end of the heterogeneous charging controllable switch 203;
the main power management chip 201 is configured to detect whether a charger docked with the auxiliary power management chip 202 provides power access through the dc detection terminal, and if so, control the heterogeneous charging controllable switch 203 to turn on through the dc enable terminal so as to input power provided by the charger docked with the auxiliary power management chip 202 to the USB operating voltage input terminal of the auxiliary power management chip 202. A difference between the embodiment of the present invention and the first embodiment is shown here, that is, the main power management chip 201 of the embodiment of the present invention detects whether a charger docked with the auxiliary power management chip 202 provides power access through a detection end, so as to trigger the switching of the charging mode, whereas a user manually controls the mobile terminal to switch the charging mode in the first embodiment; the two embodiments can meet the requirements of different users or application scenarios.
At this time, the auxiliary power management chip 202 charges the battery by using the power provided by the charger docked with the auxiliary power management chip 202, the main and auxiliary power management chips 202 may communicate with each other through the internal bus connection, and the main power management chip 201 notifies the auxiliary power management chip 202 that the voltages used when the batteries are charged in parallel need to be agreed, but the charging currents may be set according to respective policies.
Optionally, based on the conventional practice in the field at the initial charging time, the embodiment of the present invention also designs a technical solution of adopting trickle charging when the battery voltage is low at the initial charging time, that is, when the main power management chip 201 adopts a charger interfacing with the main power management to charge the battery, the main power management chip 201 is further configured to:
before detecting whether a charger in butt joint with the auxiliary power management chip 202 provides power access, judging whether the voltage of the battery reaches a set starting voltage threshold value;
if yes, detecting whether a charger in butt joint with the auxiliary power management chip 202 provides power access;
if not, trickle charging the battery by adopting a charger in butt joint with the main power management chip 201, and detecting whether the charger in butt joint with the auxiliary power management chip 202 provides power access or not until the voltage of the battery reaches a set starting voltage threshold value.
Optionally, when the main power management chip 201 and the auxiliary power management chip 202 charge the battery in parallel, it is determined whether the voltage of the battery reaches a set full-charge voltage threshold:
if yes, gradually reducing the charging current provided by the main power management chip 201 or the auxiliary power management chip 202 for the battery.
Since the battery of the mobile terminal is connected to the circuit inside the mobile terminal, and besides the battery, the circuit also includes some necessary peripheral circuit components, such as wires, etc., if the measured voltage of the battery has reached the full-charge voltage threshold, which is usually 4.4V, it cannot be said that the voltage of the battery itself has reached 4.4V, but is about to reach 4.4V, so that the final charging process can be continuously completed by gradually reducing the charging current of the auxiliary power management chip 202 or the main power management chip 201.
In the embodiment of the invention, the wired and wireless chargers connected with the main and auxiliary power management chips 202 are used for charging the battery of the mobile terminal under the control of the main power management chip 201, so that the heating value of a single power management chip is reduced while the quick charging is realized.
As shown in fig. 4, a third embodiment of the present invention provides a parallel charging circuit, in which a similar charging controllable switch 205 is added on the basis of the circuit of the second embodiment, so that when a wired or wireless charger charges a battery of a mobile terminal at the same time, if the charger docked with the auxiliary power management chip 202 quits supplying power, the main power management chip 201 can still use the auxiliary power management chip 202 and perform parallel charging on the battery in two paths based on the power supplied by the charger docked with the main power management chip 201.
The parallel charging circuit of the embodiment of the invention comprises: a main power management chip 201, an auxiliary power management chip 202, a heterogeneous charging controllable switch 203, a homogeneous charging controllable switch 205, and a wireless charging receiving chip 204, wherein,
the input end of the similar parallel charging controllable switch 205 is connected to the intermediate voltage end of the main power management chip 201, the output end of the similar parallel charging controllable switch 205 is connected to the USB working voltage input end of the auxiliary power management chip 202, and the controlled end of the similar parallel charging controllable switch 205 is connected to the USB enabling end of the main power management chip 201;
when the main power management chip 201 detects that the charger docked with the auxiliary power management chip 202 does not provide power access through the direct current detection terminal:
the main power management chip 201 controls the similar charging controllable switch 205 to be turned on through the USB enable terminal so as to input the power, which is provided by the charger corresponding to the main power management chip 201 and is output through the intermediate voltage terminal, to the USB working voltage input terminal of the auxiliary power management chip 202, and controls the heterogeneous charging controllable switch 203 to be turned off through the dc enable terminal; the primary power management chip 201 informs the secondary power management chip 202 to charge the battery with the voltage in accordance with the negotiation. At this time, the auxiliary power management chip 202 charges the battery with power supplied from a charger corresponding to the main power management chip 201. The battery voltage end of the main power management chip 201 and the battery voltage end of the auxiliary power management chip 202 are both connected to the battery.
Or, the main power management chip 201 controls the heterogeneous charging controllable switch 203 to be turned off through the dc enable terminal. The embodiment of the invention not only provides a scheme of parallel charging the battery by dividing into two paths, but also provides a technical scheme of charging the battery by only one path of the main power management chip 201 when the charger docked with the auxiliary power management chip 202 quits power supply, thereby providing more choices for users.
Optionally, the homogeneous parallel charging controllable switch 205 and the heterogeneous parallel charging controllable switch 203 each include: transistor-like switches, or, chip-like switches.
Optionally, the transistor-based switch includes: a single transistor switch, or a combination of transistors; the structure of the single-transistor switch is shown in fig. 5, the structure of the single-transistor combination switch is shown in fig. 6, and R is a bias resistor. When the transistor combination switch is of the same type and is charged with the controllable switch 205, the current can be prevented from reversely flowing into the main power management chip 201 to damage the main power management chip 201, and the chip safety is guaranteed.
The chip switch comprises: the high voltage protects the chip. The structure of the high voltage protection chip is shown in fig. 7. When the high-voltage protection chip is used as a heterogeneous charging switch, the damage of short-time large voltage output by the wireless charging receiving chip 204 to the auxiliary power management chip 202 can be prevented, and the charging safety is guaranteed.
Optionally, when the main power management chip 201 and the auxiliary power management chip 202 charge the battery in parallel, it is determined whether the voltage of the battery reaches a set full-charge voltage threshold:
if yes, gradually reducing the charging current provided by the main power management chip 201 or the auxiliary power management chip 202 for the battery.
Since the battery of the mobile terminal is connected to the circuit inside the mobile terminal, and besides the battery, the circuit also includes some necessary peripheral circuit components, such as wires, etc., if the measured voltage of the battery has reached the full-charge voltage threshold, which is usually 4.4V, it cannot be said that the voltage of the battery itself has reached 4.4V, but is about to reach 4.4V, so that the final charging process can be continuously completed by gradually reducing the charging current of the auxiliary power management chip 202 or the main power management chip 201.
An example of the application of the present invention is described below with reference to fig. 8 based on the above-described embodiment.
The parallel charging circuit provided by the application example of the invention comprises: a main power management chip PMIC1, an auxiliary power management chip PMIC2, a heterogeneous charging controllable switch 801, a homogeneous charging controllable switch 802 and a wireless charging receiving IC, wherein,
the main power management chip PMIC1 is in butt joint with an external wired charger;
the auxiliary power management chip PMIC2 is in butt joint with an external wireless charger through a wireless charging receiving IC;
the heterogeneous charging controllable switch 801 is connected between the auxiliary power management chip PMIC2 and an external wireless charger and is controlled by enabling of the main power management chip PMIC1, specifically, the heterogeneous charging controllable switch 801 is connected between the auxiliary power management chip PMIC2 and the wireless charging receiving IC.
The heterogeneous parallel charging controllable switch adopts a high-voltage protection chip OVP, a control end EN of the high-voltage protection chip OVP is connected with a direct-current enabling port of a main power management chip PMIC1, an input end In of the high-voltage protection chip OVP is connected with an output end OUT of a wireless charging receiving IC, the input end of the wireless charging receiving IC is connected with the wireless charger, and the output end OUT of the high-voltage protection chip OVP is connected with a USB working voltage input port USB _ IN of an auxiliary power management chip PMIC 2;
the detection port DC _ Sen of the main power management chip PMIC1 is connected with the output end OUT of the wireless charging receiving IC or the input end In of the high-voltage protection chip OVP, and the detection port DC _ Sen is used for detecting whether the wireless charging receiving IC has wireless power input.
The homogeneous and controllable switch 802 is a transistor combination switch, which includes: the driving switch transistor and the two transistors in the form of transistors are connected with a bias resistor R being equal to 100 omega between the grid and the source of the two transistors in the form of geminate transistors, the grid of the two transistors in the form of geminate transistors is connected with the drain of the driving transistor, the source connected with the drain of the driving switch transistor is grounded, and the grid of the driving switch transistor is connected with the USB enabling end USB _ EN of the main power management chip PMIC 1.
The two external drains of the two transistors IN the form of the pair of transistors are respectively connected to the middle voltage terminal MID of the main power management chip PMC1 and the USB operating voltage input terminal USB _ IN of the auxiliary power management chip PMC 2.
The parallel charging circuit works in the way that firstly, the default state is that the transistor combination switch is in the closed state, and the OVP of the wireless charging path is also in the closed state. When the main power management chip PMIC1 detects that there is a wired charger connected, the battery power is first detected, and if the battery power is low, for example, lower than 3.6V, the battery is trickle charged only by the PMIC 1. If the battery power is higher than 3.6V or reaches 3.6V, the PMIC1 will check whether the wireless charging IC has power input through the DC _ Sen terminal. If so, the battery Battry is charged wiredly and wirelessly by the PMIC2 while communicating with the PMIC2 and simultaneously turning on OVP through the DC _ EN terminal. The charging is fastest, and the heating is smaller at the moment all the current is divided into two paths. If no power input is detected in one path of wireless charging, the transistor combination switch is turned on through the USB _ EN end at the moment, the power output by the MID end of the PMIC1 is supplied to the PMIC2, and the PMIC1 and the PMIC2 charge the battery in parallel. When the battery is charged to a floating voltage of 4.4V, which is the full charge voltage set in the previous embodiment, the charging current of the PMIC2 is gradually decreased, which is used for both wireless and wired parallel charging. Then, OVP is turned off through a DC _ EN terminal to turn off the wireless charging mode or a USB _ EN terminal turns off a transistor combination switch to turn off the parallel charging.
If the wireless charging power input is detected only through the DC _ Sen terminal of the PMIC1, and no power input exists at the USB _ IN terminal of the PMIC1, the PMIC1 communicates with the PMIC2, and OVP is turned on through the DC _ EN terminal to supply power to the PMIC2, so that the battery is wirelessly charged IN one way.
A fourth embodiment of the present invention provides a mobile terminal, which includes a battery and the parallel charging circuit described in the first embodiment, the second embodiment, the third embodiment, or the application example.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A parallel charging circuit, comprising: the system comprises a main power management chip, an auxiliary power management chip, a heterogeneous parallel charging controllable switch and a wireless charging receiving chip, wherein one of the main power management chip and the auxiliary power management chip is in butt joint with an external wired charger, and the other power management chip is in butt joint with an external wireless charger through the wireless charging receiving chip; the heterogeneous parallel charging controllable switch is connected between the auxiliary power supply management chip and an external corresponding charger and is controlled by the enabling of the main power supply management chip, and the main power supply management chip and the auxiliary power supply management chip are used for charging batteries in parallel;
the main power management chip inputs power provided by a charger butted with the auxiliary power management chip to the auxiliary power management chip by controlling the conduction of the heterogeneous charging controllable switch in the process of charging the battery by adopting the charger butted with the main power management chip; the main power supply management chip informs the auxiliary power supply management chip to charge the battery by adopting the voltage in accordance with the negotiation;
the input end of the heterogeneous charging controllable switch is connected with the output end of the wireless charging receiving chip, the output end of the heterogeneous charging controllable switch is connected with the USB working voltage input end of the auxiliary power supply management chip, and the controlled end of the heterogeneous charging controllable switch is connected with the direct current enabling end of the main power supply management chip; the direct current detection end of the main power management chip is connected with the output end of the wireless charging receiving chip or the input end of the heterogeneous parallel charging controllable switch; the main power supply management chip is used for detecting whether a charger in butt joint with the auxiliary power supply management chip provides power supply access through the direct current detection end, if so, the heterogeneous charging controllable switch is controlled to be conducted through the direct current enabling end so as to input power supply provided by the charger in butt joint with the auxiliary power supply management chip to the USB working voltage input end of the auxiliary power supply management chip;
the circuit, still include: the input end of the same type parallel charging controllable switch is connected with the middle voltage end of the main power management chip, the output end of the same type parallel charging controllable switch is connected with the USB working voltage input end of the auxiliary power management chip, and the controlled end of the same type parallel charging controllable switch is connected with the USB enabling end of the main power management chip; when the main power supply management chip detects that the charger butted with the auxiliary power supply management chip does not provide power supply access through the direct current detection end: the main power supply management chip controls the similar charging controllable switch to be switched on through the USB enabling end so as to input a power supply which is provided by a charger corresponding to the main power supply management chip and is output through the middle voltage end to the USB working voltage input end of the auxiliary power supply management chip, and simultaneously controls the dissimilar charging controllable switch to be switched off through the DC enabling end; the main power supply management chip informs the auxiliary power supply management chip to charge the battery by adopting the voltage in accordance with the negotiation;
or the main power management chip controls the heterogeneous and controllable switch to be switched off through the direct current enabling end.
2. The parallel charging circuit of claim 1, wherein said homogeneous charge controllable switch and said heterogeneous charge controllable switch each comprise: transistor-like switches, or, chip-like switches.
3. The parallel charging circuit of claim 2, wherein the transistor-like switch comprises: a single transistor switch, or a combination of transistors; the chip switch comprises: the high voltage protects the chip.
4. The parallel charging circuit of claim 1, wherein the primary power management chip, in charging the battery with a charger interfacing with the primary power management chip, is further to: before controlling the heterogeneous charging controllable switch to be conducted, judging whether the voltage of the battery reaches a set starting voltage threshold value or not; if so, controlling the heterogeneous charging controllable switch to be conducted so as to input power provided by a charger in butt joint with the auxiliary power management chip into the auxiliary power management chip; if not, trickle charging the battery by adopting a charger in butt joint with the main power supply management chip, and controlling the heterogeneous charging controllable switch to be conducted when the voltage of the battery reaches a set starting voltage threshold value so as to input the power supply provided by the charger in butt joint with the auxiliary power supply management chip to the auxiliary power supply management chip.
5. The parallel charging circuit of claim 1, wherein the primary power management chip, in charging the battery with a charger interfacing with the primary power management chip, is further to: before detecting whether a charger in butt joint with the auxiliary power management chip provides power access, judging whether the voltage of the battery reaches a set starting voltage threshold value; if yes, detecting whether a charger in butt joint with the auxiliary power management chip provides power access; and if not, trickle charging the battery by adopting a charger in butt joint with the main power supply management chip, and detecting whether the charger in butt joint with the auxiliary power supply management chip provides power supply access or not when the voltage of the battery reaches a set starting voltage threshold value.
6. The parallel charging circuit of claim 1, wherein the main power management chip is further configured to: judging whether the voltage of the battery reaches a set full-charge voltage threshold value: if so, gradually reducing the charging current provided by the main power supply management chip or the auxiliary power supply management chip for the battery.
7. A mobile terminal, characterized in that it comprises a parallel charging circuit according to any of claims 1 to 6.
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| CN111509822A (en) | 2019-01-31 | 2020-08-07 | 北京小米移动软件有限公司 | Wireless charging receiving end, terminal and wireless charging method |
| CN109672254B (en) * | 2019-02-22 | 2021-01-29 | 维沃移动通信有限公司 | Charging control circuit, terminal equipment and control method |
| CN110518668A (en) * | 2019-09-05 | 2019-11-29 | 深圳传音控股股份有限公司 | For the quick charging system and method for handheld device, handheld device |
| CN114465332B (en) * | 2022-04-14 | 2022-07-22 | 珠海智融科技股份有限公司 | Power supply switching system and method for wired charging and wireless charging |
| WO2023230808A1 (en) * | 2022-05-31 | 2023-12-07 | Renesas Electronics America Inc. | Multi path battery charger |
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